The interquartile range formula is the first quartile subtracted from the third quartile: IQR = Q3 – Q1.

What is an example of an IQR?

The interquartile range is equal to Q3 minus Q1. For example, consider the following numbers: 1, 3, 4, 5, 5, 6, 7, 11. Q1 is the middle value in the first half of the data set. … The interquartile range is Q3 minus Q1, so IQR = 6.5 – 3.5 = 3.

Do you put units on IQR?

The unit of measure for the IQR is the same as the unit of measure for the variable X. For example, if X represents income of individuals in dollars, each percentile is also in dollars and the IQR is in dollars.